I don't think they will go back to a gold standard per se but I do think that something along the lines of a commodity basket backed digital SDR might be the route they go if current fiat system collapsed.

"we have something new and better than those dollars. It's digital but it is backed by commodities".

It will be a mess and totally as manipulated as the current system but I think they try everything and anything before Bitcoin. Doesn't mean Bitcoin doesn't win in the end.